What is the unknown special purpose behind Zhu Yuanzhang's "Four Major Cases of Hongwu"?

Anyone who knows a little about the history of the Ming Dynasty must remember the four major cases of Hongwu, because they killed too many people and were cruel. Even in the long history of China, it is difficult to find such a major case. Zhu Yuanzhang, as a party to the four major cases of Hongwu, must have an idea, otherwise he wouldn't have killed so many people.

We all know that Zhu Yuanzhang was born in a slight cold. Later, in troubled times, under various coincidences, he won many tough battles step by step and finally became an emperor. Zhu Yuanzhang is very, very concerned about the stability of his imperial power, and anything that may threaten his imperial power will be killed by Zhu Yuanzhang.

The four major cases of Hongwu are the reflection of this phenomenon. On the surface, there are four independent cases, all of which are actually interrelated. Each case is a manifestation of Zhu Yuanzhang's further strengthening of imperial power. It can be said that in order to maintain the stability of imperial power, Zhu Yuanzhang did everything possible.

At the same time, Zhu Yuanzhang was also clearing the way for his next emperor. Because Zhu Yuanzhang was the founding emperor, many ministers in the DPRK fought side by side with him. These ministers were all masters of Gao Zhen, and it may be difficult for the general emperor to surrender them. Once Zhu Yuanzhang dies, Zhu Yunwen, the grandson of Zhu Yuanzhang, may not be able to subdue these ministers.

So these ministers who contributed to Gao Zhen are obviously a threat to the imperial power. In order to clear the way for Zhu Yunwen, Zhu Yuanzhang executed all those who felt threatened by these cases. So in the final analysis, the four great schools of Hongwu were used by Zhu Yuanzhang to strengthen the imperial power.